Metal-working machine.



No. 725,292. PATENTED APR. 14, 1903. A. M. STILLMAN.

METAL WORKING MACHINE.

APPLICATION FILED JUNE 25. 1901.

No menu. 2 SHEETS-SHEET 1.

U ITED *r FFICE.

M ETAL-WORKING MACHIN E.

SPECIFICATION forming part of Letters Patent No. 725,292, dated April14', 1903.

Application filed June 25,1901. Serial No. 65,956. N m e To aZZ whom itnuty concern:

Beit known that I, AUGUSTUS M. STILLMAN, a citizen of the United States,and a resident of Hartford, in the county of Hartford and State ofConnecticut, have invented certain new and useful ImprovementsinMetal-Working Machines, of which the following is a full, clear, andexact description,whereby any one skilled in the art can make and usethe same.

My invention relates to that class of metal" working machines employedfor performing. various operations upon comparatively small pieces ofwork and which are commonly known as screw-machines, although notemployed solely for the purpose of making screws, such machines beingcapable of pro ducing a great number of different articles; 1 and theobject of my invention is to produce portion of a machine embodying myinvention. Fig. 2 is a detail end View in section through the guidewayson line a: a: of Fig. 1. i

Fig. 3 is a detail view, in vertical cross-section, on enlarged scale,through the machine just at the right of the rear clamp as seen inFig. 1. enlarged scale, of the locking-plate for the rear clamp. Fig. 5is a detail view in section on line y y of Fig. 3. Fig. 6 is a plan viewof the machine.

In the accompanying drawings the-"numeral 1 indicates a portion of theframe of the machine, on which are mounted bearings 2 for a spindle 3,supporting pulleys 4, by means of which the spindle is operated. Thesepulleys 4, mounted on the spindle, consist of fast and loose pulleyscommon to this class of machines and which are operated as by means of abelt 5, extending from any suitable driving means, as a counter-shaft orlike part. A rock-shaft 6 is supported in the tends.

frame, to which is secured at one end a beltshi'fter 7 and at theopposite end a stop-motion arm 8. (Shown in dotted outline in Fig. l.)

The spindle 3 has secured to its front end a die-ho1der 9, which ispreferably constructed to hold a plural number of dies adapted tooperate upon a rod 10 of metal. In the form of device shown hereinrecesses 11 are formed in the die-holder in which the dies 12 arelocated and held in an axial opening, as by means of set-screws 13, theconstruction of the die-holder and the means of holding a die therein asto a single die only being an old and wel1-known one.

Guideway-supports 14 are mounted on the frame of the machine, preferablyon each side, and on these supports one end of the guideways 15 is held.These guideways, as shown in Fig. 2, consist of angle-irons of L shape,and the opposite ends of these guideways are supported on a cross-piece16,mounted ona post 17, that is adjustably held in a base 18.

A guide 19 is supported on the guideways 15, and this guide has anopening in which the rod 10 is adapted to be located and secured, as byrod-clamp 20. This rod-clamp, as shown in the drawings, preferablyconsists of a screw extending through the guide to the recess inposition to engage the rod, and from this screw a clamp-arm 21 ex- Thescrew is preferably of com paratively quick pitch, so that a slightturning movement will cause the screw to release its ,hold upon the rod.Fig. 4. is a detail face Vl6W-, on

An intermediate support-rod 22 is pivoted to a bracket 23, secured tothe post 17, a spring 24: holding this support normally in an uprightposition. This construction enables the support 22 to yield when theguide-19 comes in contact with it, the latter passing over the support,after which it returns to its normal position under the influence ofspring 24, whereupon it supports the overhanging end of the work, sothat a very long Wire may be conveniently drawn through thethreading-dies.

Slideways 25 are secured to and project from the end of the frame, andon these slideways a clamp-slide 26 is supported, so thatit may slidefreely thereon. Clamp-jaws 27 are mounted radially in the clamp-slide,which ICO the die-holder is caused to rotate.

has an opening so formedv as to receive a rod and locate it between theclamp-jaws. Each clamp-jaw is provided with suitable means for causingthem to be closed or opened, in the form shown a pin 28 on each jawbeing located in position to be acted upon by the cam-surface 29 on theactuator 30. This actuator is mounted on the clamp-slide, so that it maybe easily rotated, the cam-surfaces 29 being so formed that thisrotation will cause the clamp-jaws 27 to be closed upon a rod of stock.A pin 31 is securedto the face of the actuator and serves as a part ofthe means for rotating the actuator.

A locking-disk 32 is secured to the spindle 3, and this locking-diskbears a pin 33, adapted to engage the pin 31 to rotate the actuator. Thepins 31 and 33 are eccentrically mounted with respect to each other, sothat when the pin 31 is in the uppermost position, as shown in Fig. 1,it will be engaged by the pin 33; but when the pin 31 has been roratedto the position shown in Fig. 3 the pin 33 will pass by and bedisengaged from the pin 31.

The locking-disk 32 is splined to the spindle 3, and a spring 34: tendsto hold the disk at the outer limit of its play.

A latch 35 is secured to the frame of the machine in position to engagethe plate 32 to hold it at its innermost position, and a trip 36 islocated in position to engage the latch to release it from the disk 32.In the form shown this trip consists of a sliding bar mounted on thesupports 2, the opposite end of the trip being so formed as to belocated in the path of movement of the guide 19 and be operated thereby.In the form of device shown this trip 36 has a beveled end adapted toengage a projection from the latch 35, so that as the trip is movedendwise the latch is forced downward.

A stop-rod 37, suitably supported, is connected with the stop-motion arm8 and has on its opposite end, adjustably secured thereto, a block lyingin the path of movement of the clamp-slide 20. This construction enablesthe machine to be stopped at any predetermined position that may bereached by the clamp-slide.

The operation of the device is as follows: The spindle 3 being rotated,as by the belt 5,

of stock 10 is secured near one end in the follower or guide 19 and theopposite end of the rod engaged with the advance die in the dieholder 9.The rod-support 22 sustains the rod between the ends and prevents anydistortion of the rod. The operation of the die causes therod to bemoved lengthwise, carrying with'it the guide 19, which as it comes incontact with the support 22 causes the latter to be swung on its pivotagainst the force of the spring 24, which after the guide has passedfrom engagement with the support causes it to be returned to its normalposition. The guide 19 continues to move until it en- The rod engagementwith the projection from the latch .35, which is thereby disengaged fromthe locking-disk 32. During the operation just described and after theguide 19 has encountered the trip 36 the clamp-arm 21 has hit a stop 10,secured in the path of movement of the arm, which is rotated,.so as torelease the hold of the rod-clamp on the rod. The disengagement ofthe-latch 35 from the lockingdisk 32, above described, allows the latterto be thrust toward the clamp-slide 26, the pin 33 coming in contactwith the pin 31 and rotating the actuator 30,thus causing the clampjawsto approach each other and grasp the rod of stock. This grasp of theclamp-jaws on the rod is effected at the time of disengagement of therod-clamp 20 or about this time. Just before the end of the rod passesthe last die in the die-holder the clamp-slide 26 encounters the blockon the stop-rod 37, moving the stop motion arm 8, rocking the shaft 6,and swinging the belt-shifter to stop the machine, which operation iseffected at the same time as or just before the final disengagement ofthe rod from the threading-dies. Thus it will be seen that the severalautomatically-operating devices or mechanisms are called into action byor through the movement of the work itself as it is fed along by meansof the dies and that some of the automatic movements are effecteddirectly or indirectly by the follower 19, which is secured to the workin advance of the dies and which also preferably serves as a guide forthe work.

For some kinds of work 1 preferably employ two dies, as illustrated.Variations may be resorted to within the scope of my invention, andportions of my improvement may be used without others.

What I claim as my invention, and desire to secure by Letters Patent, isv 1. In a rod-threading machine, in combination ,a threading-die; meansfor operating said die; aslide mounted in advance of the die; awork-clamp provided upon said slide; means rendered effective by themovement of said slide for releasing the work from said clamp; a slidemounted in the rear of the die; a workengaging clamp upon said rearslide; and means for causing the last-mentioned clamp to engage thework.

2. In a rod-threading machine, in combination,a threading-die; means foroperating said die; a slide mounted in advance of the die; a work-clampprovided upon said slide; means rendered effective by the movement ofsaid slide for releasing the work from said clamp; a slide mounted inthe rear of thedie; a workengaging clamp upon said rear slide; and meanshaving an operative connection with said rear slide, for causing thelast-mentioned clamp to engage the work.

3. In a metal-working machine, in combination, a threading-die, meansfor operating said die, a slide located in rear of the die and havingdevices for engaging the work, and

IIO

means connectible to the work in advance of the die and movable by thework, for causing said devices to engage the work during the movement ofsuch work.

4. In a metal-working machine, in combination, a threading-die, meansfor operating said die, a slide arranged to engage the work in rear ofthe die, and a stop-motion device arranged to be operated by said slide.

5. In a metal-working machine, in combination, a die, means foroperating the die, a slide mounted in advance of the die, means on saidslide for grasping a piece of work, a slide mounted in rear of the die,means on said slide for grasping a piece of work, and connectionsbetween the two slides for operating the grasping means on one from themovement of the other.

6. In a metal-working machine, in combination, a die; means foroperating the die; a slide connectible to the work in advance of thedie; and a support for the work located between the die and the slideand in the path of said slide, and mounted so that it may be moved outof the way by said slide.

7. In a metal-working machine, in combination, a die; means foroperating the die; a

slide adapted to support a piece of work in advance of the die; and aswinging support for the work between the die and the slide; said slidebeing movable past said swinging support, so as to carry the work closeup to said die.

8. In a metal-working machine, the combination with a die, of shiftablemeans adapted to support the work at one side of said die, and aswinging work-support located in position to be thrown out of operationby the supporting means on the movement thereof.

9. In a metal-Working machine, the combination with a die, of shiftablemeans adapted to support the work at one side of said die, a movableWork-support located in position to be thrown out of operation by theshift/able means on the movement thereof, and means effective toautomatically return said support into position after the passage ofsaid shiftable means to support the work at the opposite side thereof.

10. In a metal-working machine, the combination of a threading andfeeding die; means located in position to grasp the work; and meansoperable by the work during the feed ing movement thereof, for effectingthe engagement of the work by said grasping means.

11. In a metal-working machine, the combination of a threading andfeeding die; means located in position to grasp the work at one partthereof; means operable by the work for effecting the engagement'of thework by said grasping means; means for grasping the work at another partthereof; and means also operable by the work during its feeding movementfor effecting the release of the work by said last work-grasping means.

12. In a metal-working machine, the combination of a threading andfeeding die; a dieholder; means for supporting the work at one side ofsaid holder; means for supporting the work on the other side of saidholder; and means operable by the work for causing one of saidsupporting means to engage the work .and the other of said supportingmeans to release the work.

13. In a metal-working machine, the combination of a die; means locatedin advance of the die for clamping the work; means located in the rearof the die for clamping said work; and a connection between the twoclamping means for operating one of said means. during the movement ofthe other.

14,. In a metal-working machine, the combination of a die; means forgrasping the work in advance of said die; means for grasping the work inrear of said die; and adjustable means between the advance and reargrasping means for operating the latter at a predetermined point in themovement of the work, for causing said rear grasping means to grasp theWork.

15. In ametal-working machine, the combination of a threading andfeeding die; means for grasping the work in advance of said die; meansfor grasping the work in rear of said die; means for effecting arelative rota tion between said die and said work-grasping means; one ofsaid die and work-grasping elements being capable of movement in adirection parallel to the axis of the threading die; means renderedeffective by the movement of said moving part for causing said advancegrasping means to release the work; and means also rendered effective bythe movement of said moving part for causing said rear grasping means tograsp the work.

16. In a metal-working machine, the combination with a die, of means forclamping the work at one side of said die and automatically operative ata predetermined period to grasp the work, a device effective to controlthe operationof said clamping means, and means automatically shiftableinto position by the work to engage and operate said device and therebyeffect the engagement of the Work by said clamping means.

17. In a metal-working machine, the combination with a die, of means forclamping and supporting the work at the rear of said die, work clampingand supporting means in advance of the said die; and means for enablingthe advance clamping and supporting means to cause the rear clamping andsupporting means to clamp the work, and means for causing the advanceclamping and supporting means to release the work.

18. A rod-threading machine, comprising a die-holder, a die carriedthereby, work-holding means in rear of said die, said work-holding meansincluding a grasping device, means for holding the work in advance ofthe die, means for automatically releasing the work from said advanceholder at a predetermined point,and automatically-operating means forcausing said work-grasping device to grasp the work substantially at thetime when it is released by said means for holding the work in front ofthe die.

19. In a metal-workin g machine, the combination with a die, of meansshiftable by the work for supporting the Work in advance of said die,and including releasable Workclamping means; means for clamping the Workin the rear .of the die; means operable 10 through the movement of theWork for controlling the clamping operation of said last clamping means;and means operable by the rear Work-holder for stopping the machine; therear clamping means being constructed to be moved with the Work in orderthat it :5

may be operative to stop the machine.

AUGUSTUS M. STILLMAN. Witnesses:

ARTHUR B. JENKINS, MARY S. STILLMAN.

